Control device



Feb. 5, 1935. R. K. WINNING CONTROL DEVI CE Filed July 22, 1932 SnventorEN? A Gttomegs Patented Feb. 5, 1935 y l e UNITED STATES PATE-NTol=lflcl31ff-y CONTROL DEVICE Robert K. Winning', Wauwatosa, lWis.,assignor to Clum Manufacturing Company, Milwaukee, t Wis., a corporationof Wisconsin Application July v22, 1932,v serial No. 623,932 flola'ims.(o1. 74-503) This invention relates to improvements in-conof tube 25 iscompressed at 21 to reciprocate the trol devices. y composite BowdenWire through any desirable The present application is a companion to myflexible sheath. The use of several plies alterco-pendingapplicationSerial No. 593,675, liled nately Wound in opposite directionsmakes'l vthe February 17,1932,1and entitled Control devices.reciprocable element ofthe Bowden wire very 5 It is the object of theypresent invention to Streng and yet Suciently flexible to transmitmoprovide an improved structure wherein the detien 'through a Sheath ofany curvature normally tent and guide means are combined, therebyrefound iu PTaCteedueing the numberl ef pai-ts required and Detent meansare used for fixing one or more l0 strengthening` the assembly by theelimination' predeterminedpositions of the control rod and 10 ofapertures used in the construction previously its` ESSOCeted Darts andfel' Simultaneously Securing' the control rod against angular orrotaemployed. l

In the drawing; tive .displacement independently yof cooperative Figure1 is a vertical axial section through a guldlng vmeans Which may 01' methOt be emlr, device embodying the present invention ployed'. -A radial.bore 27,111 disk 6 receives a 15 Figure 2 is a fragmentary detail inaxial Seccompression spring 28aotinng upon plunger 29, non showing theparts ln dlflerent'posltlon from hal/111s a reduced termmal Dm purtwn30. The

those in which they appear in Figure 1 control rod 25 has a longitudinalslot at 3l, en- Flgure is adetall view taken in section ln the luged at32 t0 Drei/'1de longitudinally spaced cyplane indicated at 3 3 nFigure 1. llndrlcal apertures yinto `which the plunger 29 is 20 Figure 4is a detail view in bottom plan of the l'eeelveble, the Pln 30 beingeeeVable into all tubular operating shalt. portions of slot 31 undercompression of the Like parts are identified by the same referenceSpring 23- The plu al' all times C Onnes the C011- characters throughoutthe several views. tl'el Shaft 25 agelnst angular dlspleeement and Asupport typical of the usual instrument pan- 'elle plunger itself, Whenengaged in 011e 0f the 2.54 l

el is illustrated at 4 and is provided with an aperapellllll'ee 32Desl'f'lVelY leek the Shaft against ture through which extends thethreaded plug 5 wel movement tu addltlen, the plunger 29 upon thereduced extremity of which disk 6 is held Serves to key the dlsk 6 t0Plug 5 by upsetting the material of the plug as Shown To release thedetentI provlde at 35 a release at 7. The disk 6 constitutes a head forthe plug pm extelldmg axle'llY Wlthm the tubular Control 30 which isheld ill clamping engagement with dash rod and llelmally held in 3retracted DOSitOn by 4 by means of nut 8 and an interposed Washercompresslon sprlng 36, acting on push button 37 9. The device isexteriorly finished by means of Wlllell 1 8 alte'ehefl t0 the en@ 0fthis Din. The rea stamped shell 10, apertured in registry with lease pm1 5 PTeVlded OPPOSlte eeeh 0f the aperthe tubular bore through plug 5and having its tures 32 with beveled shoulders 39 leading to pe- 35 marmal onions 11 formed about the mar in ripheral grooves 40 at such depthas to receive of thge hea or disk 6 g the pin 30. When the push button37 is pressed The plug 5 Serves as a mounting for a tubular ilwardlybygtlle operator against the compression barrel 12 upon which the innerend portion 13 o spring 3 t e beveled surfaces 3l? move across of theplug is sleeved and compressed to retain aprtlres and got astcams on pm30 to force 40 the parts in assembly. A tubular control rod 25 sermsalaper ures he plunger 29 engaged is reciprocable within the barrel 12 andprojects The Operation of the device is the Same regard therefromthrough the bOIe 0f Plug 5 and elle less of the particular aperture withwhich the registering aperture 0f the finishing plate 01 Shell plungermay be engaged at the time. Figure 2 45 10. To its outer end is xed aknob 26 whereby shows how the release pin 35, in its extreme posithecontrol rod may be reciprocated. Its reciprotion, has lifted pin 30 andexpelled the plunger 29 cation is transmitted to a Bowden Wire element.from aperture 32. The number of detent posi- While any desired type ofBowden wire element tions of this device may be varied at will byvarymay be used, it is preferred that the Bowden wire ing the number ofapertures and by providing a 0 be a composite structure made up of threeplies corresponding number of grooves on the control l of piano wire,alternately wound helioally in oppin 35. posite directions, as shown at18, 19, and 20'. Each The fact that a single member, the plunger 29, plyincludes a number of strands of wire wound functions as a detent pin andas a key to secure 5 5 together. Upon this composite structure the endthe control rod against angular displacement not 55 only reduces expenseof parts and cost of assembly but also strengthens the construction,since only one slot in the tubular control rod is required, theremainder of its surfaces being imperforate. The operation is alsoappreciably smoother than any other devices for this purpose.

I claim:

1. Acontrol rod assembly, comprising the combination of a cylindricalcontrol rod having a slot extending longitudinally in one side thereof,said slot being laterally enlarged at intervals to provide detentreceiving sockets between which the inwardly curving margins of the slotform elongated detent supporting trackways, a detent having a portioncontinuously engaged in said slot and another portion having a diametergreater than the width of the slot between the sockets and sufficientlyless than the internal diameter of the rod to allow it to enter a socketwheny in registry therewith, and means, associated with the rod, formoving the enlarged portion of the detent out of the socket in which itis engaged to permit longitudinal readjustments of said rod, the reducedportion of the detent being adapted to prevent rotative displacement ofthe rod when the detentis not engaged in one of said sockets.

2. A control rod assembly, comprising the combination with a hollowcontrol rod having aslot in one side thereof, laterally enlarged atpredetermined intervals to provide detent receiving socketsdeterminative of the operatingpositions of saidV rod, a detent having arod guiding portion permanently engaged in said slot, anda lockingportion engageable in the respective sockets when in registry therewith,said locking portion. being adapted to bear upon the margins of the slotbetween the sockets when out of socket engagement, and a detentadjusting cam slide within the rod having elongated cam portions uponwhich the reduced inner end portion of the detent may ride,

and intervening portions of less diameter adapted to allow the detent tomove to locking position when in registry with one of the sockets.

3. A control rod assembly, comprising the cornbination with a tubularcontrol rod having a longitudinally extending slot, laterally enlargedto provide detent receiving sockets at spaced intervals predetermined inlength by the locking requirements of said rod, a detent having a rodguiding portion permanently engaged in said slot and a locking portionformed to ride upon a slot margin between the sockets and engageable inthe respective sockets when in registry therewith, and a detentactuating cam within the rod having elongated detent supporting portionsupon which said permanently engaged portion of the detent may ride andanother portion hollowed out to allow the detent to enter a socket withwhich it is in registry.

4. iA control rod assembly, comprising the combinationwith a cylindricalcontrol rod having a longitudinally extending slot, laterally enlargedto provide detent receiving sockets at spaced intervals predetermined inlength by the locking requirements of said rod, a detent having a rod dguiding port-ion. permanently engaged in said slot and a locking portionformed to ride upon a slot margin between the sockets and engageable inthe respective sockets when in registry therewith, and a detentactuating cam having elongated detent. supporting portions upon whichsaid permanently engaged portion of the detent may ride and otherportions reduced to allow the detent to enter a socket with. which it isin registry, said detent actuating cam having inclined surfaces at f theends of the elongated portions adapted to actuate the detent from a`locking to an unlocking position preparatory to a readjustment of thecontrol rod. n

ROBERT K. WINNING.

